class ComponentPool<T extends PooledComponent>{
    private _cache: T[];
    private _type: any;

    constructor(typeClass: any){
        this._type = typeClass;
        this._cache = [];
    }

    public obtain(): T{
        try {
            return this._cache.length > 0 ? this._cache.shift() : new this._type();
        } catch(err){
            throw new Error(this._type + err);
        }
    }

    public free(component: T){
        component.reset();
        this._cache.push(component);
    }
}